The Sauerbraten (Cube 2) engine is an advanced and complete originally open source engine available today, with many novel features unavailable elsewhere. Its main strength is its very productive content pipeline which is especially attractive to smaller companies making casual or serious games. Read more

(commercial) SmartCVS is a full-featured and still easy-to-use CVS client. It contains all needed tools out-of-the- box, so there is no need to install a file compare tool, CVS command line client, or SSH client. It is available in two versions: a free Foundation version and a commercial Professional version. The Professional version contains powerful features like a conflict solver, transaction view, tag browser (including tag/branch structure), and change report (multi-file compare).

(commercial) SmartSVN is a platform independent, powerful, and easy-to-use Subversion client. In addition to the normal SVN commands like checkout, update, commit, merge, etc., it provides tag and branch handling (no need to deal with URLs just to switch to a different tag or branch), a built-in file compare and conflict solver, and many more. There is no need to install additional tools for handling SVN working copies, like a command line SVN client or a file compare tool.

(commercial) SpectrumSCM is an enterprise-level Source Configuration and Management solution, which includes version control, process management, release management, advanced branching, issue tracking and much more, all integrated into one tool. In addition, it allows users to construct automated workflow engines and interfaces to external systems through the SpectrumSCM API. The tool also incorporates advanced security features through the Java Security Model, SSL, and LDAP. The client software can be run as an application or accessed over the Web as an applet or through Java Web Start. It also includes a full-featured commandline interface, strong IDE integrations, and a SpectrumSCM Proxy for remote users.

Subversion is a free/open-source revision control system (RCS). That is, Subversion manages files and directories over time. These files and directories are placed into a central storage called repository. The repository is quite similar to a ordinary file server, except that it remembers every change ever made to your files and directories. This allows one to recover older versions of your data, or examine the history of how your data changed.